Determination and Geologic Significance of Yingshan Unconformity of Lower Ordovician in Tazhong Area, Tarim Basin
详细信息
- 责任者：Yu Hongfeng (Research Institute of Exploration and Development ; Tarim Oilfield Company ; PetroChina ; Korla 841000 ; China) ; Bai Zhongkai
- 刊名：Xinjiang Petroleum Geology
- 出版年：2011
- 卷期：32(3)
- 关键词：不整合 ; unconformities ; 油气勘探 ; petroleum exploration ; 塔里木盆地 ; Tarim Basin
- 页码：p.231-234
- 图表：4 illus., 2 tables, 6 refs.
- 分类号：1003
- issnNo：ISSN1001-3873
- isbnNo：CN65-1107/TE
摘要
An unconformity exists in Yingshan Formation of the Lower Ordovician in Tazhong area. This paper restudies the unconformity by means of unconformity method, geophysics, logging response feature, lithology and color of cavern sand and shale as well as microfossil information, combining with the results of high-accuracy seismic reservoir prediction and evaluation. It suggests that this large karst unconformity is widely distributed in Tazhong slope area, with good stratified and connected features, being as a favorable reservoir. This paper elaborates the key event for hydrocarbon accumulation and petroleum resource extent of the Ordovician carbonate reservoir.
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